CN104253463A - System and method for limiting power of battery - Google Patents
System and method for limiting power of battery Download PDFInfo
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- CN104253463A CN104253463A CN201310507190.1A CN201310507190A CN104253463A CN 104253463 A CN104253463 A CN 104253463A CN 201310507190 A CN201310507190 A CN 201310507190A CN 104253463 A CN104253463 A CN 104253463A
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- 238000005259 measurement Methods 0.000 claims description 7
- 230000001052 transient effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract description 8
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- 238000011084 recovery Methods 0.000 description 5
- 238000007726 management method Methods 0.000 description 4
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- 239000000446 fuel Substances 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
- B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/12—Recording operating variables ; Monitoring of operating variables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/13—Maintaining the SoC within a determined range
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/14—Preventing excessive discharging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/15—Preventing overcharging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/25—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by controlling the electric load
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Combustion & Propulsion (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
Abstract
A system and method for limiting power of a battery in which a minimum discharging voltage reference value and a slew rate for discharging power are prepared per temperature section and the slew rates for discharging power are applied differently according to temperatures. The method includes measuring, by a sensor, temperature of a battery and measuring, by a controller, a minimum voltage of a battery cell. The controller is configured to adjust a discharging limitation by reducing the discharging power limitation value by the slew rate for discharging power at a corresponding temperature section when the minimum voltage of a battery cell is less than the minimum discharging voltage reference value at the corresponding temperature section.
Description
The cross reference of related application
The application requires the priority of No. 10-2013-0075165th, the korean patent application submitted on June 28th, 2013 according to 35U.S.C. § 119 (a), its full content is hereby expressly incorporated by reference.
Technical field
The present invention relates to the system and method for the power for limiting battery, this system and method by keeping normal voltage region improve the durability of battery and improve vehicle power performance by applying suitable switching rate (slew rate) to battery to limit its power in high-voltage battery.
Background technology
Usually, in the Cleaning Equipment of hybrid vehicle such as using high-voltage battery, charge and discharge power (assistance/regeneration of motor) is determined in the power limit sent from battery management system.The available horsepower of high-voltage battery depends on the cell voltage of battery, and wherein when cell voltage height, charge power is restricted, and when cell voltage is low, discharge power is restricted.For this reason, the power of the battery in battery management system (BMS) arranges recovery voltage value be restricted to recover power by arranging deboost value with power-limiting.In addition, the control of deboost value and recovery voltage value has hysteresis to avoid trembling.
When cell voltage arrives deboost, the power limit of BMS reduces.In addition, the power limit of BMS continues to reduce until the voltage of battery arrives recovery voltage, and after the voltage of battery reaches recovery voltage, the power limit of BMS increases.But the power limit of BMS increases according to the moment of the voltage of battery and reduces and sharply reduce, thus the charge and discharge amount sharply changing hybrid vehicle makes vehicle vibration.In other words, when the voltage of battery reaches recovery voltage, the power limit of battery management system increases, and the power limit of battery management system increases according to the transient voltage of battery and voltage reduces sharply to reduce.
According to prior art, do not consider the characteristic sum temperature of battery, be applied for the switching rate of the Power Limitation of BMS in a lump, but, when applying the switching rate identical with room temperature at low temperatures, when Power Limitation changes, the risk in the normal voltage region of departing from high-voltage battery will be increased.Therefore, at room temperature apply the switching rate identical with under basic low temperature and power and may excessively limited when Power Limitation changes, thus the power-performance of reduction vehicle.
The description provided above is only used to help to understand background technology of the present invention as prior art of the present invention and the present invention should not be interpreted as being included in prior art well known by persons skilled in the art.
Summary of the invention
The invention provides the system and method for the power for limiting battery, this system and method can by guaranteeing that in high-voltage battery normal voltage region is improved the durability of battery and can improve vehicle power performance by applying suitable switching rate to battery to limit its power.
For limiting the method for the power of battery, in the method, formulate minimum discharge voltage reference value and discharge power switching rate for each temperature section and can differently apply discharge power switching rate according to temperature, the method can comprise: the temperature measuring battery; Measure the minimum voltage of battery unit; And when the minimum voltage of battery unit is less than the minimum discharge voltage reference value at relevant temperature section, by discharge power limits value being reduced regulate electric discharge restriction in the discharge power switching rate of relevant temperature section.
Method for limiting the power of battery can also comprise: when the discharge power limits value of battery has been reduced the discharge power switching rate at relevant temperature section, discharge power limits value is cut down to about 0, and therefore, discharge power limits value about can be less than 0.
A kind of method of the power for limiting battery, in the method, formulate maximum charging voltage reference value and charge power switching rate for each temperature section and can differently apply charge power switching rate according to temperature, the method can comprise: the temperature measuring battery; Measure the maximum voltage of battery unit; And when the maximum voltage of battery is greater than the maximum charging voltage reference value at relevant temperature section, by charge power limits value being reduced regulate charging restriction in the charge power switching rate of relevant temperature section.
Method for limiting the power of battery can also comprise: when the charge power limits value of battery has been reduced the charge power switching rate at relevant temperature section, charge power limits value is cut down to about 0, and therefore, charge power limits value is about less than 0.
A kind of method of the power for limiting battery, in the method, for each temperature section formulates maximum discharge voltage reference value with discharge power switching rate and can according to the different low applying discharge power switching rate of temperature, the method can comprise: the temperature measuring battery; Measure the minimum voltage of battery unit; And when the minimum voltage of battery unit is greater than the maximum discharge voltage reference value at relevant temperature section, regulate electric discharge restriction by being increased by discharge power limits value in the discharge power switching rate of relevant temperature section.
A kind of method of the power for limiting battery, in the method, formulate minimum charge reference value and charge power switching rate for each temperature section and can differently apply charge power switching rate according to temperature, the method can comprise: the temperature measuring battery; Measure the maximum voltage of battery unit; And when the maximum voltage of battery unit is less than the minimum charge reference value at relevant temperature section, regulate charging restriction by being increased by charge power limits value in the charge power switching rate of relevant temperature section.
In the method for the power for limiting battery, discharge power switching rate and charge power switching rate can be set for each temperature section, and when the discharge power limits value of battery or charge power limits value will be reduced, discharge power switching rate or the charge power switching rate that can be applied to relevant temperature section reduce discharge power limits value or charge power limits value stage by stage.
In the method for the power for limiting battery, discharge power switching rate and charge power switching rate can be set for each temperature section, and when the discharge power limits value of battery or charge power limits value should increase, discharge power switching rate or the charge power switching rate that can apply relevant temperature section increase discharge power limits value or charge power limits value by stages.
Accompanying drawing explanation
Describe above-mentioned and other feature of the present invention in detail referring now to its illustrative embodiments shown by accompanying drawing, accompanying drawing provides only by illustration hereinafter and does not therefore limit the present invention, and in accompanying drawing:
Fig. 1 is the block diagram of the method for the power for limiting battery that exemplary embodiment of the invention is shown; And
Fig. 2 is the block diagram of the method for the power for limiting battery illustrated according to exemplary embodiment of the invention.
Should be understood that, accompanying drawing not necessarily are drawn in proportion, but present the expression simplified to a certain extent of the various example feature that general principle of the present invention is described.Specific design feature of the present invention (such as comprising given size, orientation, position and shape) disclosed herein will partly be determined by specific expection application and environment for use.
In the drawings, run through several figure of accompanying drawing, reference number refers to the parts of identical or equivalence of the present invention.
Embodiment
Certainly, term " vehicle " or " vehicle " or other term similar used herein comprise motor vehicles substantially, such as comprise the passenger car of SUV (SUV), bus, truck, various commercial car, comprise the water carrier of various canoe and boats and ships, aircraft etc., and comprise motor vehicle driven by mixed power, motor vehicle, plug-in hybrid electric vehicles, hydrogen-powered vehicle, fuel-cell vehicle and other alternative fuel vehicles (such as from the fuel that resource in addition to petroleum obtains).As referred to herein, motor vehicle driven by mixed power is the vehicle with two or more power source, such as petrol power and electric power vehicle.
Although illustrative embodiments is described to use multiple unit to perform exemplary process, be to be understood that exemplary process can be performed by one or more module equally.In addition, should be understood that term controller/control unit refers to the hardware unit comprising memory and processor.This memory is configured to memory module, and this processor is configured to perform described module to perform the one or more process hereafter will further described particularly.
In addition, control logic of the present invention can be embodied as the non-transient computer-readable medium comprising the executable program instructions performed by processor, controller/control unit etc. on computer-readable medium.The example of computer-readable medium includes but not limited to ROM, RAM, CD (CD)-ROM, tape, floppy disk, flash drive, smart card and optical data storage device.Computer readable recording medium storing program for performing also can be distributed in network coupled computer system and make computer-readable medium store in a distributed way and perform, such as, by telematics server or controller local area network (CAN).
Specialized vocabulary used herein only is not intended to limit the present invention to describe specific execution mode.Unless explicitly pointed out in context, otherwise singulative used herein " (a) ", " one (an) " and " should (the) " be intended to comprise plural form equally.Further, should understand, the term used in this specification " comprise (comprises) " and/or " comprising (comprising) " specify state feature, integer, step, operation, element and/or assembly existence, but do not get rid of other features one or more, integer, step, operation, the existence of element and/or their group or interpolation.As used in this article, term "and/or" comprises the relevant one or more arbitrary and all combinations listing item.
Unless to explicitly point out within a context or obviously, otherwise as used herein, the term " approximately " be understood to be in should in field normal admissible error scope in, such as, in 2 standard errors of mean value." approximately " can be understood to be in 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0.05% or 0.01% of stated value.Unless clearly visible within a context, otherwise all numerical value provided herein are modified by term " approximately ".
Hereinafter, now will in detail with reference to various illustrative embodiments of the present invention, embodiment shown in the drawings and being described below.
Fig. 1 is the block diagram of the method for the power for limiting battery performed by controller illustrated according to exemplary embodiment of the invention; And Fig. 2 is the block diagram of the method for the power for limiting battery performed by controller according to exemplary embodiment of the invention.
According to the method for the power for limiting battery of the present invention, discharge power switching rate and charge power switching rate can be set for each temperature section, and when discharge power limits value or charge power limits value need to be reduced, discharge power switching rate or the charge power switching rate that can be applied to relevant temperature section reduce discharge power limits value or charge power limits value stage by stage.Each temperature section refers to the responsive predetermined temperature section affecting battery performance.
According to another method of the power for limiting battery of the present invention, discharge power switching rate and charge power switching rate can be set for each temperature section, and when the discharge power limits value of battery or charge power limits value need to be increased, discharge power switching rate or the charge power switching rate that can be applied to relevant temperature section increase discharge power limits value or charge power limits value stage by stage.In other words, for the high-power battery of vehicle, when charging and discharging, the charge power limits value and the discharge power limits value that limit charge power and discharge power respectively can be applied, wherein according to various situation, the present invention relates to the change of charge power limits value and discharge power limits value.Charge power limits value and discharge power limits value can change the voltage stabilization seeking battery unit stage by stage, and wherein, power limit can utilize constant switching rate to change stage by stage.Particularly, according to the present invention, different switching rates can be applied based on temperature, wherein, according to prior art, when utilizing constant switching rate evenly to change power limit, the voltage of battery is unstable and is lowered to below minimum voltage, thus about determining the stability of battery or affecting the power-performance of vehicle and cause fault.Therefore, the characteristic of battery and temperature association, wherein, switching rate according to temperature section along with experiment value suitably changes.
Battery is composed of multiple units, and wherein, the minimum unit voltage in battery and maximum cell voltage, that is, the minimum voltage of battery unit and maximum voltage can be measured by the voltage measuring each unit.In addition, can determine and control the electric discharge of battery based on minimum voltage and can determine and control the charging of battery based on maximum voltage, thus conservatively controlling battery to maintain its durability.
Therefore, discharge power switching rate and charge power switching rate can be set for each temperature section.And when discharge power limits value or charge power limits value need to be reduced, discharge power switching rate or the charge power switching rate that can be applied to relevant temperature section reduce discharge power limits value or charge power limits value stage by stage.
In addition, when discharge power limits value or charge power limits value need to be increased, discharge power switching rate or the charge power switching rate that can apply relevant temperature section increase discharge power limits value or charge power limits value stage by stage, therefore different switching rates can be applied based on temperature section, thus the voltage of more stably actuating battery unit.
Particularly, in the method for the power for limiting battery according to the present invention, can minimum discharge voltage reference value and discharge power switching rate be formulated for each temperature section and discharge power switching rate can be applied according to temperature, wherein, the method can comprise the following steps: by the temperature S100 of sensor measurement battery; The minimum voltage S200 of battery unit is measured by controller; And when the minimum voltage of battery unit is less than the minimum discharge voltage reference value at relevant temperature section, by controller by discharge power limits value being reduced the discharge power switching rate at relevant temperature section, regulate electric discharge restriction S300.
Minimum discharge voltage reference value and discharge power switching rate can be formulated for each temperature section.When the minimum voltage of battery unit is less than the minimum discharge voltage reference value at relevant temperature section, the electric discharge of battery should limit by reducing discharge power limits value, because when cell during discharge, can affect the durability of battery.
Therefore, when the temperature of battery is by sensor measurement, the minimum discharge voltage reference value of relevant temperature section and the minimum voltage of battery unit can be compared by controller.When the minimum voltage of battery unit is less than the minimum discharge voltage reference value at relevant temperature section, the discharge power limits value of battery can reduce the discharge power switching rate at relevant temperature section.
On the contrary, for charging, can be that each temperature section formulates maximum charging voltage reference value and charge power switching rate, and when the maximum voltage of battery is greater than the maximum charge reference voltage level at relevant temperature section, charge power limits value can be reduced the charge power switching rate at relevant temperature section.In other words, differently can arrange for determining the minimum electric discharge reference voltage level and the maximum charge reference voltage level that limit electric discharge or limit charging for each temperature section, and the switching rate according to reference value that differently can arrange for each temperature section, thus guarantee the best power restriction of battery and the durability of battery unit.
In addition, when discharge power limits value or charge power limits value reduce by applying switching rate, discharge power limits value or charge power limits value can be calculated as and be about 0, error when being about less than 0 to prevent the decreasing value when discharge power limits value or charge power limits value.
In addition, in another method of the power of restriction battery according to the present invention, can maximum discharge voltage reference value and discharge power switching rate be formulated for each temperature section and can differently apply discharge power switching rate according to temperature, wherein, the method can comprise the following steps: the temperature S100 measuring battery; Measure the minimum voltage S200 of battery unit; And when the minimum voltage of battery unit is greater than the maximum discharge voltage reference value of relevant temperature section, regulate electric discharge restriction S300 by being increased by discharge power limits value in the discharge power switching rate of relevant temperature section.
In other words, when the minimum voltage of battery unit is greater than the maximum discharge voltage reference value at relevant temperature section, discharge power limits value oppositely can increase to respond when the more discharge capacities of needs, and therefore the discharge power limits value of battery can increase the discharge power switching rate at relevant temperature section.According to control logic as above, the discharge power limits value of battery can repeatedly reduce by stages according to the switching rate optimized for relevant temperature section and increase.
In addition, even if for charging, in method according to the power for limiting battery of the present invention, can minimum charge reference value and charge power switching rate be formulated for each temperature section and charge power switching rate can be applied according to temperature, wherein, the method can comprise the following steps: by the temperature S100 of sensor measurement battery; The maximum voltage S200 of battery unit is measured by controller; And when the maximum voltage of battery is less than the minimum charge reference value of relevant temperature section, regulate charging restriction S400 by controller by charge power switching rate charge power limits value being increased relevant temperature section.
Fig. 2 is the block diagram of the power for limiting battery illustrated according to exemplary embodiment of the invention.As shown in Figure 2, observe the temperature section of battery, when the temperature of battery is greater than A, enter into the logic of relevant temperature section.In addition, when measure battery minimum voltage Vmin and measure minimum voltage Vmin be less than the minimum discharge voltage reference value Vout_st1 of relevant temperature section time, the discharge power limits value Pout of battery can be reduced the discharge power switching rate at relevant temperature section.When Vmin is greater than the Vout_st1 of relevant temperature section, discharge power limits value Pout(can be kept such as, there is no change) and previous discharge power limits value Pout_prev can be kept.
Similarly, when measure battery maximum voltage Vmax and measure maximum voltage Vmax be greater than the maximum charging voltage reference value Vin_st1 of relevant temperature section time, the charge power limits value Pin of battery can be reduced the charge power switching rate at relevant temperature section.When Vmax is less than when the Vin_st1 of relevant temperature section, charge power limits value Pin(can be kept such as, there is no change) and previous charge power limits value Pin_prev can be kept.
When by the minimum voltage of battery unit compared with maximum discharge voltage reference value to increase discharge power limits value time, or when by the maximum voltage of battery compared with minimum charge reference value to increase charge power limits value time, above-mentioned logic can be applied.
According to the method for the power of the restriction battery of such as above-mentioned configuration, optimal parameter can be applied to meet the durability of battery according to the characteristic sum environmental condition of battery, and according to the more available horsepower of external condition ACTIVE CONTROL battery, thus the available maximum power utilizing battery can be made it possible to.According to the method for the power for limiting battery, the phenomenon that the cell voltage manifested at specified temp section reduces can be prevented in advance.
Describe the present invention in detail with reference to illustrative embodiments of the present invention.But those of skill in the art are appreciated that these illustrative embodiments can change when not departing from principle of the present invention and spirit, scope of the present invention limits in claims and their equivalent.
Claims (12)
1. for limiting a method for the power of battery, wherein, for each temperature section formulates minimum discharge voltage reference value and discharge power switching rate, and differently apply described discharge power switching rate according to temperature, described method comprises:
By the temperature of sensor measurement battery;
The minimum voltage of battery unit is measured by controller; And
When the described minimum voltage of battery unit is less than the described minimum discharge voltage reference value at relevant temperature section, by described controller by discharge power limits value being reduced the described discharge power switching rate at described relevant temperature section, regulate electric discharge restriction.
2. the method for the power for limiting battery according to claim 1, also comprises:
When the described discharge power limits value of battery has been reduced when the described discharge power switching rate of described relevant temperature section, by described controller, described discharge power limits value is cut down to about 0, make described discharge power limits value about be less than 0.
3. for limiting a method for the power of battery, wherein, for each temperature section formulates maximum charging voltage reference value and charge power switching rate, and differently apply described charge power switching rate according to temperature, described method comprises:
By the temperature of sensor measurement battery;
The maximum voltage of battery unit is measured by controller; And
When the described maximum voltage of battery unit is greater than the described maximum charging voltage reference value at relevant temperature section, by described controller by charge power limits value being reduced the described charge power switching rate at described relevant temperature section, regulate charging restriction.
4. the method for the power for limiting battery according to claim 3, also comprises:
When the described charge power limits value of battery has been reduced when the described charge power switching rate of described relevant temperature section, by described controller, described charge power limits value is cut down to about 0, make described charge power limits value about be less than 0.
5. for limiting a method for the power of battery, wherein, formulate maximum discharge voltage reference value and discharge power switching rate for each temperature section and differently apply described discharge power switching rate according to temperature, described method comprises:
By the temperature of sensor measurement battery;
The minimum voltage of battery unit is measured by controller; And
When the described minimum voltage of battery unit is greater than the described maximum discharge voltage reference value at relevant temperature section, by described controller by discharge power limits value being increased the described discharge power switching rate at described relevant temperature section, regulate electric discharge restriction.
6. for limiting a method for the power of battery, wherein, for each temperature section formulates minimum charge reference value and charge power switching rate, and differently apply described charge power switching rate according to temperature, described method comprises:
By the temperature of sensor measurement battery;
The maximum voltage of battery unit is measured by controller; And
When the described maximum voltage of battery unit is less than the described minimum charge reference value at relevant temperature section, by described controller by charge power limits value being increased the described charge power switching rate at described relevant temperature section, regulate charging restriction.
7. one kind for limiting the method for the power of battery, wherein, for each temperature section arranges discharge power switching rate and charge power switching rate, and when the discharge power limits value of battery or charge power limits value will be reduced, the described discharge power switching rate or the described charge power switching rate that are applied to relevant temperature section reduce described discharge power limits value or described charge power limits value by stages.
8. one kind for limiting the method for the power of battery, wherein, for each temperature section arranges discharge power switching rate and charge power switching rate, and when the discharge power limits value of battery or charge power limits value need to be increased, the described discharge power switching rate or the described charge power switching rate that are applied to relevant temperature section increase described discharge power limits value or described charge power limits value by stages.
9. for limiting a system for the power of battery, wherein, for each temperature section formulates minimum discharge voltage reference value and discharge power switching rate, and differently apply described discharge power switching rate according to temperature, described system comprises:
Controller, comprises memory and processor, and described memory is configured to stored program instruction and described processor is configured to perform described program command, and described program command is configured to when being performed:
Control transducer to measure the temperature of battery;
Measure the minimum voltage of battery unit; And
When the described minimum voltage of battery unit is less than the described minimum discharge voltage reference value at relevant temperature section, by discharge power limits value being reduced regulate electric discharge restriction in the described discharge power switching rate of described relevant temperature section.
10. system according to claim 9, wherein, described program command is configured to further when being performed:
When the described discharge power limits value of battery has been reduced when the described discharge power switching rate of described relevant temperature section, described discharge power limits value is cut down to about 0, makes described discharge power limits value about be less than 0.
11. 1 kinds of non-transient computer-readable mediums comprising the program command performed by controller, described computer-readable medium comprises:
Control transducer to measure the program command of the temperature of battery;
Measure the program command of the minimum voltage of battery unit; And
When the described minimum voltage of battery unit is less than the described minimum discharge voltage reference value at relevant temperature section, by reducing discharge power limits value to regulate in the described discharge power switching rate of described relevant temperature section the program command of electric discharge restriction.
12. non-transient computer-readable mediums according to claim 11, also comprise:
Cut down to about 0 when the described discharge power switching rate of described relevant temperature section, by described discharge power limits value when the described discharge power limits value of battery has been reduced, make described discharge power limits value about be less than the program command of 0.
Applications Claiming Priority (2)
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|---|---|---|---|
| KR10-2013-0075165 | 2013-06-28 | ||
| KR20130075165A KR101509895B1 (en) | 2013-06-28 | 2013-06-28 | Method for limiting power of battery |
Publications (2)
| Publication Number | Publication Date |
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| CN104253463A true CN104253463A (en) | 2014-12-31 |
| CN104253463B CN104253463B (en) | 2019-05-21 |
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| CN201310507190.1A Active CN104253463B (en) | 2013-06-28 | 2013-10-24 | System and method for limiting the power of battery |
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| Country | Link |
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| US (1) | US20150006933A1 (en) |
| JP (1) | JP6178678B2 (en) |
| KR (1) | KR101509895B1 (en) |
| CN (1) | CN104253463B (en) |
| DE (1) | DE102013220350B4 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2015011983A (en) | 2015-01-19 |
| CN104253463B (en) | 2019-05-21 |
| US20150006933A1 (en) | 2015-01-01 |
| KR101509895B1 (en) | 2015-04-06 |
| DE102013220350B4 (en) | 2024-08-08 |
| KR20150001982A (en) | 2015-01-07 |
| DE102013220350A1 (en) | 2014-12-31 |
| JP6178678B2 (en) | 2017-08-09 |
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